[alt-photo] Re: VDB problem
david drake photo
ddrakephoto at casadrake.ca
Fri Jan 21 21:35:02 GMT 2011
I don't know where you're located but low humidity does not mix well
with the iron processes. I seem to recall trying this paper years ago
during the dry winter time and got very thin results that literally
peeled off the paper. Vandyke likes around 50-60% humidity. I use a
humidifier in the winter.
As for the first wash, I use filtered water with citric acid added.
The chlorine can be a problem with clearing; but I don't think that
would be related to your problem.
I would also let it fully ripen and then try again.
On 21-Jan-11, at 1:42 PM, John Brewer wrote:
> Hi Francis,
> Thanks for your comments. No, I didn't let the solution ripen, I'll
> again tomorrow or Sunday. The print situation is odd, I'm using
> Artistico Extra White HP 300gsm. This has worked in the past with
> VDB and
> other alt processes so I don't think it's a soaking in the paper
> unless it is a precipitate that got through the filter sitting on the
> surface. Do you process in tap water or distilled water?
> On 21 January 2011 17:06, francis schanberger <frangst at gmail.com>
>> Did you let the solution ripen (sit for 24 -48 hours) after mixing?
>> Regarding the precipitate, I have noticed that if a lot forms
>> during mixing
>> that most of it will go into solution after about a week.
>> I never have had to microwave. I usually mix the VDB in a 500mL
>> bottle and
>> carefully transfer the solution, using a transfer (plastic)
>> pipette, into
>> 30mL dropper bottles after it has ripened.
>> Regarding the print symptoms, I have never encountered what you have
>> described. It sounds like the emulsion isn't sinking into the paper.
>> francis schanberger
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